在asp.net中登录错误

本文关键字：登录 错误 net asp | 更新日期: 2023-09-27 18:13:31

在asp.net中登录错误，例如名称UserName在当前上下文中不存在，名称Password在当前上下文中不存在。Asp.code 

 <asp:Login ID="Login1" runat="server" BackColor="#F7F7DE" BorderColor="#CCCC99" BorderStyle="Solid" BorderWidth="1px" Font-Names="Verdana" Font-Size="10pt" Height="242px" Width="448px">
    <LayoutTemplate>
        <table cellpadding="1" cellspacing="0" style="border-collapse:collapse;">
            <tr>
                <td>
                    <table cellpadding="0" style="height:242px;width:448px;">
                        <tr>
                            <td align="center" colspan="2" style="color:White;background-color:#6B696B;font-weight:bold;">Log In</td>
                        </tr>
                        <tr>
                            <td align="right">
                                <asp:Label ID="UserNameLabel" runat="server" AssociatedControlID="UserName">Username:</asp:Label>
                            </td>
                            <td>
                                <asp:TextBox ID="UserName" runat="server"></asp:TextBox>
                                <asp:RequiredFieldValidator ID="UserNameRequired" runat="server" ControlToValidate="UserName" ErrorMessage="User Name is required." ToolTip="User Name is required." ValidationGroup="Login1">*</asp:RequiredFieldValidator>
                            </td>
                        </tr>
                        <tr>
                            <td align="right">
                                <asp:Label ID="PasswordLabel" runat="server" AssociatedControlID="Password">Password:</asp:Label>
                            </td>
                            <td>
                                <asp:TextBox ID="Password" runat="server" TextMode="Password"></asp:TextBox>
                                <asp:RequiredFieldValidator ID="PasswordRequired" runat="server" ControlToValidate="Password" ErrorMessage="Password is required." ToolTip="Password is required." ValidationGroup="Login1">*</asp:RequiredFieldValidator>
                            </td>
                        </tr>
                        <tr>
                            <td colspan="2" align="center">
                                <asp:CheckBox ID="RememberMe" runat="server" Text="Remember me next time." />
                            </td>
                        </tr>
                        <tr>
                            <td align="center" colspan="2">
                                <asp:Button ID="LoginButton" runat="server" CommandName="Login" Text="Log In" ValidationGroup="Login1" OnClick="LoginButton_Click" />
                            </td>
                        </tr>
                    </table>
                </td>
            </tr>
        </table>
    </LayoutTemplate>
    <TitleTextStyle BackColor="#6B696B" Font-Bold="True" ForeColor="#FFFFFF" />
</asp:Login>

c#代码
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["Project_DBConnectionString"].ConnectionString)
    SqlCommand cmd = new SqlCommand("select * from signin where Username =@username and Password=@password", con);
    cmd.Parameters.AddWithValue("@username", UserName.Text);
    cmd.Parameters.AddWithValue("@password", Password.Text);
    SqlDataAdapter da = new SqlDataAdapter(cmd);
    DataTable dt = new DataTable();
    da.Fill(dt);
    if (dt.Rows.Count > 0)
    {
        Response.Redirect("Default.aspx");
    }
    else
    {
        ClientScript.RegisterStartupScript(Page.GetType(), "validation", "<script language='javascript'>alert('Invalid Username and Password')</script>");
    }

在asp.net中登录错误

在登录控件上，您需要使用FindControl来获取这两个文本框，并且它们不能直接用于页面。

使用这个来访问它们

TextBox TheUserName = Login1.FindControl("UserName") as TextBox;
TextBox ThePassword = Login1.FindControl("Password") as TextBox;

，然后在你的代码中使用它们

cmd.Parameters.AddWithValue("@username", TheUserName.Text);
cmd.Parameters.AddWithValue("@password", ThePassword.Text);
相关文章：